Valerie Amaranth, an ordinary 16 year old, has her world changed forever when she receives the powers of the Legendary Crystal Warrior Diamond Heart. Now with the help of Diana, she must find her allies, defeat the Nightmares, and rescue the missing princess Rosalia.

Will Val defeat the Nightmares, make new friends, and perhaps find the love of her life along the way? Or will she meet her tragic end? Your choices decide her fate and the fate of humanity in this magical visual novel.